/* ============================================================
   DESIGN.md 实现 — 黑白极简 × 克制留白 · L2 流畅交互
   所有颜色经 CSS 变量引用，禁止硬编码 hex
   ============================================================ */

/* 字体在 index.html head 异步加载（preconnect + media 切换），不在此处 @import：
   @import 会串行阻塞渲染；且站点面向中国大陆用户，Google Fonts 不可达时
   不能拖慢首屏——失败即系统字体兜底（DESIGN.md 字体规范） */

:root {
  /* Backgrounds */
  --bg: #FFFFFF;
  --surface: rgba(0, 0, 0, 0.03);
  --surface-hover: rgba(0, 0, 0, 0.055);
  --surface-brand: #FFFFFF;

  /* Borders */
  --border: rgba(0, 0, 0, 0.1);
  --border-hover: rgba(0, 0, 0, 0.5);

  /* Text */
  --text: #0B0B0F;
  --text-secondary: #4F4F57;
  --text-tertiary: #8C8C95;

  /* Accent — 黑白极简：强调色即纯黑，靠明度层级而非色相做区分 */
  --accent: #0B0B0F;
  --accent-hover: #33333A;
  --accent-2: #8A8A92;   /* 仅用于黑白灰渐变暗端，不作功能色 */
  --on-accent: #FFFFFF;

  /* RGB variants for rgba() */
  --bg-rgb: 255, 255, 255;
  --accent-rgb: 11, 11, 15;

  /* Semantic */
  --success: #34D399;
  --error: #F87171;
  --warning: #FBBF24;

  /* Shape & Motion */
  --radius: 16px;
  --radius-sm: 10px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --container: 1200px;
  --section-pad: 120px;
}

/* ============ 基础 ============ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

[id] {
  scroll-margin-top: 88px;
}
/* 章节锚点：跳转时吃掉 section 顶部留白（120px），让 eyebrow 紧贴导航下方，
   标题落在视口 ~140px 处，避免跳转后上方大片空白 */
.section {
  scroll-margin-top: -28px;
}
/* 内部布局差异补偿（about-grid 48px 间距 / contact-band 64px 内边距） */
#about {
  scroll-margin-top: -76px;
}
#contact {
  scroll-margin-top: -93px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Space Grotesk", "Noto Sans SC", -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img {
  max-width: 100%;
}

::selection {
  background: var(--accent);
  color: var(--on-accent);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: -60px;
  left: 16px;
  z-index: 300;
  padding: 10px 20px;
  background: var(--accent);
  color: var(--on-accent);
  border-radius: var(--radius-sm);
  font-weight: 500;
  text-decoration: none;
  transition: top 0.25s var(--ease-out);
}
.skip-link:focus-visible {
  top: 16px;
  outline-offset: 4px;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: var(--section-pad) 0;
  position: relative;
}

/* ============ 文字体系 ============ */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font: 500 13px/1.5 "Space Grotesk", "Noto Sans SC", sans-serif;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--accent);
  opacity: 0.6;
}

.section-title {
  font-size: clamp(30px, 4.5vw, 44px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
}

.section-lead {
  color: var(--text-secondary);
  max-width: 620px;
}

.text-accent {
  color: var(--accent);
}

.grad-text {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: none;
  filter: drop-shadow(0 0 32px rgba(var(--accent-rgb), 0.15));
}

.num {
  font-variant-numeric: tabular-nums;
}

/* ============ 按钮 ============ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 52px;
  padding: 0 32px;
  border: none;
  border-radius: var(--radius-sm);
  font: 500 15px/1 "Space Grotesk", "Noto Sans SC", sans-serif;
  letter-spacing: 0.02em;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out),
              background 0.2s var(--ease-out), color 0.2s var(--ease-out),
              border-color 0.2s var(--ease-out);
}
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.btn:active {
  transform: scale(0.97);
}
.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

.btn svg {
  width: 18px;
  height: 18px;
  flex: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--on-accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(var(--accent-rgb), 0.28);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  border-color: var(--border-hover);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn-lg {
  min-height: 60px;
  padding: 0 40px;
  font-size: 16px;
}

/* ============ 链接 ============ */

.link {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(var(--accent-rgb), 0.35);
  transition: border-color 0.25s ease, color 0.25s ease;
}
.link:hover {
  border-bottom-color: var(--accent);
  color: var(--accent-hover);
}
.link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ============ 标签 ============ */

.tag {
  display: inline-flex;
  align-items: center;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 13px;
  letter-spacing: 0.02em;
  transition: border-color 0.25s ease, color 0.25s ease;
}
.tag:hover {
  border-color: var(--border-hover);
  color: var(--text);
}

/* ============ 导航 ============ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.3s var(--ease-out),
              border-color 0.3s var(--ease-out);
}
.nav.scrolled {
  background: rgba(var(--bg-rgb), 0.78);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
}

.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.04em;
  padding: 8px 0;
}
.nav-logo svg {
  width: 30px;
  height: 30px;
  flex: none;
}
.nav-logo .logo-img {
  height: 40px;
  width: auto;
  flex: none;
}
.nav-logo .logo-en {
  display: block;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.34em;
  color: var(--text-tertiary);
  margin-top: 1px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.25;
  letter-spacing: 0.06em;
  padding: 12px 2px;
  transition: color 0.25s ease;
}
.nav-link .nav-en {
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  transition: color 0.25s ease;
}
.nav-link:hover .nav-en,
.nav-link.active .nav-en {
  color: var(--accent);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s var(--ease-out);
}
.nav-link:hover {
  color: var(--text);
}
.nav-link:hover::after {
  width: 100%;
}
.nav-link.active {
  color: var(--accent);
}
.nav-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 46px;
  height: 46px;
  padding: 11px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color 0.25s ease;
}
.nav-toggle:hover {
  border-color: var(--border-hover);
}
.nav-toggle span {
  display: block;
  height: 1.5px;
  width: 100%;
  background: var(--text);
  border-radius: 1px;
  transition: transform 0.3s var(--ease-out), opacity 0.2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  z-index: 110;
  width: 100%;
  transform-origin: left;
  transform: scaleX(0);
  pointer-events: none;
}

/* 移动端菜单 */

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(var(--bg-rgb), 0.96);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease-out), visibility 0.3s;
}
.mobile-menu.open {
  opacity: 1;
  visibility: visible;
}
.mobile-menu a {
  font-size: 26px;
  font-weight: 600;
  padding: 14px 28px;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.06em;
  transition: color 0.25s ease, transform 0.25s var(--ease-out);
}
.mobile-menu a .nav-en {
  display: block;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-top: 2px;
}
.mobile-menu a:hover {
  color: var(--accent);
  transform: translateX(4px);
}
.mobile-menu a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.mobile-menu .mobile-close {
  position: absolute;
  top: 20px;
  right: 24px;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.25s ease, color 0.25s ease;
}
.mobile-menu .mobile-close:hover {
  border-color: var(--border-hover);
  color: var(--accent);
}
.mobile-menu .mobile-close svg {
  width: 20px;
  height: 20px;
}

/* ============ Hero ============ */

.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 160px 0 80px;
}

/* Hero 静态背景层（点阵纹理 + 暗角，无动画） */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.dotgrid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(0, 0, 0, 0.06) 1px, transparent 1px);
  background-size: 30px 30px;
  -webkit-mask-image: radial-gradient(70% 60% at 50% 40%, #000 0%, transparent 100%);
  mask-image: radial-gradient(70% 60% at 50% 40%, #000 0%, transparent 100%);
}

.vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 90% at 50% 10%, transparent 55%, rgba(0, 0, 0, 0.06) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

.hero-h1 {
  font-size: clamp(44px, 7vw, 80px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.02em;
  margin: 10px 0 28px;
}

.split-line {
  display: block;
  overflow: hidden;
  padding-bottom: 0.08em;
  margin-bottom: -0.08em;
}

.split-word {
  display: inline-block;
  opacity: 0;
  transform: translateY(110%);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
  transition-delay: calc(var(--i) * 55ms + 200ms);
  will-change: transform;
}
.is-loaded .split-word {
  opacity: 1;
  transform: translateY(0);
}

.hero-sub {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 44px;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 72px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 860px;
}

.stat {
  padding: 20px 0;
  border-top: 1px solid var(--border);
  text-align: center;
  transition: border-color 0.3s ease;
}
.stat:hover {
  border-top-color: var(--border-hover);
}

.stat-num {
  font-family: "Space Grotesk", "Noto Sans SC", sans-serif;
  font-size: clamp(34px, 4vw, 52px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
}

.stat-num .suffix {
  font-size: 0.55em;
  color: var(--accent);
  font-weight: 500;
}

.stat-label {
  margin-top: 10px;
  font-size: 14px;
  color: var(--text-tertiary);
  letter-spacing: 0.08em;
}

/* 环形旋转徽章 */
.hero-badge {
  position: absolute;
  z-index: 1;
  right: 6%;
  bottom: 12%;
  width: 150px;
  height: 150px;
  animation: spin 26s linear infinite;
  opacity: 0.75;
}
.hero-badge text {
  font-family: "Space Grotesk", sans-serif;
  font-size: 11.5px;
  letter-spacing: 0.42em;
  fill: var(--text-tertiary);
}
.hero-badge .badge-center {
  animation: spinReverse 26s linear infinite;
  transform-origin: center;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}
@keyframes spinReverse {
  to { transform: rotate(-360deg); }
}

/* 滚动提示 */
.scroll-hint {
  position: absolute;
  z-index: 1;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-tertiary);
  font-size: 12px;
  letter-spacing: 0.3em;
  text-decoration: none;
  transition: color 0.3s ease;
}
.scroll-hint:hover {
  color: var(--accent);
}
.scroll-hint svg {
  width: 18px;
  height: 18px;
  animation: hintBob 2s var(--ease-out) infinite;
}
@keyframes hintBob {
  0%, 100% { transform: translateY(0); opacity: 0.5; }
  50% { transform: translateY(6px); opacity: 1; }
}

/* Hero 分层入场 */
.hero-enter {
  opacity: 0;
  animation: heroFadeUp 0.9s var(--ease-out) both;
}
.hero-enter:nth-child(1) { animation-delay: 0.05s; }
.hero-enter:nth-child(2) { animation-delay: 0.15s; }
.hero-enter:nth-child(3) { animation-delay: 0.28s; }
.hero-enter:nth-child(4) { animation-delay: 0.42s; }
.hero-enter:nth-child(5) { animation-delay: 0.56s; }
.hero-enter:nth-child(6) { animation-delay: 0.7s; }

@keyframes heroFadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============ 品牌墙 ============ */

.marquee {
  overflow: hidden;
  /* 自适应容器宽度：两侧保留留白，Logo 不滚到页面边缘 */
  width: calc(100% - 48px);
  max-width: var(--container);
  /* 上下预留 4px：chip hover 上浮 -3px 时不被 overflow 裁切（负 margin 抵消额外高度，保持原有间距） */
  padding: 4px 0;
  margin: 44px auto -8px;
  -webkit-mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
  mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
}
.marquee + .marquee {
  margin-top: 24px;
}

.marquee-track {
  display: flex;
  gap: 24px;
  width: max-content;
  animation: marquee 52s linear infinite;
}
.marquee-track.reverse {
  animation-direction: reverse;
}
.marquee:hover .marquee-track {
  animation-play-state: paused;
}

@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

.brand-chip {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 72px;
  padding: 0 30px;
  /* 透明玻璃底：自适应页面深色背景，仅留细微描边 */
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  opacity: 0.85;
  transition: opacity 0.3s ease, transform 0.3s var(--ease-out), background 0.3s ease, border-color 0.3s ease;
  flex: none;
}
.brand-chip:hover {
  opacity: 1;
  transform: translateY(-3px);
  background: var(--surface-hover);
  border-color: var(--border-hover);
}
.brand-chip img {
  max-height: 34px;
  max-width: 140px;
  object-fit: contain;
}

/* ============ 服务 Bento ============ */

.grid-services {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 48px;
}

.spotlight-card {
  position: relative;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  --mx: 50%;
  --my: 50%;
  transition: background 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
}
.spotlight-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    420px circle at var(--mx) var(--my),
    rgba(var(--accent-rgb), 0.09),
    transparent 65%
  );
  opacity: 0;
  transition: opacity 0.35s ease;
  pointer-events: none;
}
.spotlight-card:hover::before {
  opacity: 1;
}
.spotlight-card:hover {
  border-color: var(--border-hover);
  background: var(--surface-hover);
}
.spotlight-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* 核心服务卡强调：渐变底 + 高亮描边 + 角标 */
.spotlight-card.service-main {
  display: flex;
  flex-direction: column;
  background: linear-gradient(135deg, rgba(var(--accent-rgb), 0.1), rgba(var(--accent-rgb), 0.03) 55%, var(--surface));
  border-color: rgba(var(--accent-rgb), 0.35);
}
.spotlight-card.service-main:hover {
  background: linear-gradient(135deg, rgba(var(--accent-rgb), 0.14), rgba(var(--accent-rgb), 0.04) 55%, var(--surface-hover));
  border-color: rgba(var(--accent-rgb), 0.55);
}
.service-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(var(--accent-rgb), 0.14);
  border: 1px solid rgba(var(--accent-rgb), 0.4);
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.service-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(var(--accent-rgb), 0.1);
  border: 1px solid rgba(var(--accent-rgb), 0.22);
  color: var(--accent);
  margin-bottom: 22px;
  flex: none;
}
.service-icon svg {
  width: 26px;
  height: 26px;
}

.service-title {
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 12px;
}

.service-desc {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 20px;
}

.service-main .service-title {
  font-size: 26px;
}
.service-main .service-desc {
  font-size: 16px;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
}

/* ============ 作品 ============ */

.grid-works {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.work-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  aspect-ratio: 1 / 1;
  cursor: pointer;
  transition: border-color 0.3s var(--ease-out), transform 0.4s var(--ease-out);
}
.work-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
}
.work-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.work-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s var(--ease-out);
}
.work-card:hover img {
  transform: scale(1.06);
}

.work-info {
  position: absolute;
  inset: auto 0 0 0;
  padding: 36px 18px 14px;
  background: linear-gradient(to top, rgba(var(--bg-rgb), 0.92), transparent);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.35s ease, transform 0.35s var(--ease-out);
}
.work-card:hover .work-info,
.work-card:focus-visible .work-info {
  opacity: 1;
  transform: translateY(0);
}

.work-title {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.work-tag {
  margin-top: 5px;
  font-size: 12px;
  color: var(--text-tertiary);
  letter-spacing: 0.08em;
}

/* GlareHover 高光扫过 */
.glare {
  position: relative;
  overflow: hidden;
}
.glare::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    transparent 40%,
    rgba(0, 0, 0, 0.04) 45%,
    rgba(0, 0, 0, 0.08) 50%,
    rgba(0, 0, 0, 0.04) 55%,
    transparent 60%
  );
  transform: translateX(-120%);
  transition: transform 0.7s var(--ease-out);
  pointer-events: none;
  z-index: 2;
}
.glare:hover::after {
  transform: translateX(120%);
}

/* ============ 作品分类筛选 ============ */

.work-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 40px;
}

.work-tab {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-secondary);
  font-size: 14px;
  font-family: inherit;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: color 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
}
.work-tab:hover {
  color: var(--text);
  border-color: var(--border-hover);
}
.work-tab.active {
  background: rgba(var(--accent-rgb), 0.12);
  border-color: rgba(var(--accent-rgb), 0.5);
  color: var(--accent);
}
.work-tab:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.work-tab .count {
  margin-left: 7px;
  font-size: 12px;
  color: var(--text-tertiary);
  transition: color 0.25s ease;
}
.work-tab.active .count {
  color: var(--accent);
}

/* 筛选隐藏 + 切换回弹入场 */
.work-card.work-hidden {
  display: none;
}
.work-card.work-pop {
  animation: work-pop 0.5s var(--ease-out);
}
@keyframes work-pop {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ============ 流程 ============ */

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.step {
  position: relative;
  padding: 28px 24px;
  border-left: 1px solid var(--border);
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
  transition: border-color 0.3s ease, background 0.3s var(--ease-out);
}
.step:hover {
  border-left-color: var(--accent);
  background: var(--surface-hover);
}

.step-num {
  font: 600 14px "Space Grotesk", sans-serif;
  letter-spacing: 0.3em;
  color: var(--accent);
  display: block;
  margin-bottom: 14px;
}

.step-title {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 10px;
}

.step-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ============ 关于 ============ */

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
  margin-top: 48px;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.about-points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 24px;
  margin-top: 32px;
}

.about-point {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 15px;
}
.about-point svg {
  width: 18px;
  height: 18px;
  color: var(--accent);
  flex: none;
}

.about-visual img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
}

/* ============ 联系 CTA ============ */

.contact-band {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--surface);
  padding: 64px 40px;
  text-align: center;
}
.contact-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(46% 80% at 50% -20%, rgba(var(--accent-rgb), 0.12), transparent 70%);
  pointer-events: none;
}
.contact-band > * {
  position: relative;
}

.contact-lead {
  margin: 0 auto;
}

/* 微信二维码卡片（唐总 / 杨总） */
.qr-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  margin-top: 40px;
}

.qr-card {
  width: 232px;
  padding: 20px 20px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  transition: border-color 0.3s var(--ease-out), transform 0.3s var(--ease-out),
              background 0.3s var(--ease-out);
}
.qr-card:hover {
  border-color: var(--border-hover);
  background: var(--surface-hover);
  transform: translateY(-4px);
}
.qr-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.qr-img {
  width: 100%;
  aspect-ratio: 1;
  padding: 12px;
  background: var(--surface-brand);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}
.qr-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.qr-name {
  margin-top: 18px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.qr-label {
  margin-top: 6px;
  font-size: 13px;
  color: var(--text-tertiary);
  letter-spacing: 0.08em;
}

/* 地址行（紧凑居中） */
.contact-address {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 32px;
  font-size: 15px;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}
.contact-address svg {
  width: 18px;
  height: 18px;
  color: var(--accent);
  flex: none;
}

/* ============ Footer ============ */

.footer {
  border-top: 1px solid var(--border);
  padding: 64px 0 40px;
  margin-top: var(--section-pad);
}

.footer-surprise {
  text-align: center;
  color: var(--text-tertiary);
  font-size: 14px;
  letter-spacing: 0.12em;
  margin-bottom: 48px;
}

.footer-main {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-tagline {
  color: var(--text-tertiary);
  font-size: 14px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
}
.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  padding: 12px 0;
  transition: color 0.25s ease;
}
.footer-links a:hover {
  color: var(--accent);
}
.footer-links a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding-top: 28px;
  font-size: 13px;
  color: var(--text-tertiary);
}
.footer-bottom a {
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color 0.25s ease;
}
.footer-bottom a:hover {
  color: var(--text);
}

/* ============ 滚动动效 ============ */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

.scroll-float {
  will-change: transform;
}

/* ============ 响应式 ============ */

@media (max-width: 1023px) {
  .hero-badge {
    display: none;
  }
  .grid-works {
    grid-template-columns: repeat(3, 1fr);
  }
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  :root {
    --section-pad: 80px;
  }

  .container,
  .container-narrow,
  .hero-content,
  .nav-inner {
    padding-left: 20px;
    padding-right: 20px;
  }

  .nav-links,
  .nav-cta {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .nav-inner {
    height: 64px;
  }

  .hero {
    padding: 120px 0 72px;
  }
  .hero-sub {
    font-size: 16px;
  }
  .hero-cta .btn {
    width: 100%;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .scroll-hint {
    display: none;
  }

  .grid-services,
  .grid-stats,
  .steps {
    grid-template-columns: 1fr;
  }
  /* 作品区保持双列，43 张作品单列过长 */
  .grid-works {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }
  .work-info {
    padding: 36px 14px 12px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .about-points {
    grid-template-columns: 1fr;
  }

  .contact-band {
    padding: 56px 24px;
  }

  .footer-main {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ============ 作品灯箱 ============ */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(var(--bg-rgb), 0.88);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  opacity: 0;
  transition: opacity 0.3s var(--ease-out);
}
.lightbox.open {
  opacity: 1;
}
.lightbox[hidden] {
  display: none;
}

.lightbox-stage {
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  max-width: 86vw;
  transform: translateY(14px) scale(0.97);
  transition: transform 0.3s var(--ease-out);
}
.lightbox.open .lightbox-stage {
  transform: none;
}

.lightbox-frame {
  position: relative;
  display: flex;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.18);
  cursor: zoom-in;
  touch-action: none;
}
.lightbox-frame.is-zoomed {
  cursor: grab;
}
.lightbox-frame.is-dragging {
  cursor: grabbing;
}
.lightbox-frame.is-dragging .lightbox-img {
  transition: none;
}
.lightbox-img {
  display: block;
  max-width: 86vw;
  max-height: 72vh;
  -webkit-user-select: none;
  user-select: none;
  -webkit-user-drag: none;
  -webkit-touch-callout: none;
  transition: opacity 0.22s var(--ease-out);
}
@media (prefers-reduced-motion: no-preference) {
  .lightbox-img {
    transition: transform 0.16s var(--ease-out), opacity 0.22s var(--ease-out);
  }
}
.lightbox-img.is-swap {
  opacity: 0;
}

.lightbox-caption {
  display: flex;
  align-items: baseline;
  gap: 16px;
  letter-spacing: 0.04em;
}
.lightbox-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}
.lightbox-counter {
  font-size: 13px;
  color: var(--text-tertiary);
  font-variant-numeric: tabular-nums;
}

.lightbox-close {
  position: absolute;
  top: 28px;
  right: 28px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text);
  cursor: pointer;
  transition: background 0.3s var(--ease-out), border-color 0.3s var(--ease-out),
              transform 0.3s var(--ease-out);
}
.lightbox-close:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
  transform: rotate(90deg);
}
.lightbox-close:focus-visible,
.lightbox-nav:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.lightbox-close svg {
  width: 20px;
  height: 20px;
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text);
  cursor: pointer;
  transition: background 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
}
.lightbox-nav:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
}
.lightbox-nav svg {
  width: 22px;
  height: 22px;
}
.lightbox-prev {
  left: 32px;
}
.lightbox-next {
  right: 32px;
}

.lightbox-zoom {
  position: absolute;
  right: 12px;
  bottom: 12px;
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.14);
}
.zoom-btn,
.zoom-level {
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 0;
  background: none;
  color: var(--text);
  cursor: pointer;
}
.zoom-btn {
  width: 34px;
  border-radius: 50%;
  transition: background 0.25s var(--ease-out);
}
.zoom-btn:hover:not(:disabled) {
  background: var(--surface-hover);
}
.zoom-btn:disabled {
  opacity: 0.3;
  cursor: default;
}
.zoom-btn svg {
  width: 16px;
  height: 16px;
}
.zoom-level {
  min-width: 54px;
  padding: 0 6px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--text-secondary);
  transition: color 0.25s var(--ease-out);
}
.zoom-level:hover {
  color: var(--text);
}
.zoom-btn:focus-visible,
.zoom-level:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ============ Reduced Motion ============ */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .split-word,
  .reveal,
  .hero-enter {
    opacity: 1 !important;
    transform: none !important;
  }
  .marquee-track {
    animation: none !important;
  }
  .scroll-hint svg {
    animation: none !important;
  }
}